Australia | September 8, 2025

CopperString project to deliver 1,000 km of transmission lines

New substations and high-voltage transmission lines will connect Australia’s North West Minerals Province to the national grid, strengthening energy security.

 

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Image for illustrative purposes

Australia: Oceania is preparing for a major energy transition with the development of the CopperString project, a large-scale transmission initiative in Australia that will create nearly 1,000 km of high-voltage overhead power lines. The project is designed to reduce dependence on imported gas and petrol while enabling renewable integration and energy security across the region.

Led by Powerlink and the Queensland Investment Corporation (QIC), the project will link the North West Minerals Province with the national electricity market. This will unlock new industries, support critical mineral production, and provide the backbone for future green hydrogen development.

At its core, CopperString involves significant substation and transmission infrastructure, including:

  • Up to six new substation sites
  • 220 kV transmission line from Cloncurry to Mount Isa
  • 330 kV transmission line from Hughenden to Cloncurry
  • 500 kV transmission line from south of Townsville to Hughenden.

These investments will expand grid capacity, improve stability, and integrate large-scale renewable energy sources into the network.

Beyond power supply, the project has strong community benefits. Powerlink has committed to transparency with landholders and local communities, while also supporting skills development, training, and local purchasing. A legacy programme will invest in resilience, social capacity, and environmental protection.

By strengthening the backbone of the grid, CopperString not only addresses current energy security challenges but also positions Oceania for a low-carbon future, where renewable power can replace costly fossil fuel imports.

Source: Eco Portal